Question

which on of the following is the least number exactly divisible by 7​

Answer 1

Answer:

Divisibility condition

Adding 5 times the last digit to the rest gives a multiple of 7. (Works because 49 is divisible by 7.)

Subtracting 2 times the last digit from the rest gives a multiple of 7. (Works because 21 is divisible by 7.)

Answer 2

The least 5 digit number is 10000

The least 5 digit number is 10000The remainder when 10000 id divided by 7 is 4

The least 5 digit number is 10000The remainder when 10000 id divided by 7 is 4So 3 must be added to it to make it divisible by 7

The least 5 digit number is 10000The remainder when 10000 id divided by 7 is 4So 3 must be added to it to make it divisible by 7So the least 5 digit number divisible by7 is 10003

Hope it's helpful ☺️